My wife's phone has recently begun making rattling/clacking noises when calling from the car bluetooth. The phone lays in an accessory tray where it has always lain. The noise is physical/mechanical since it happens when going over bumps, etc. But I'm not sure why it is new. I wouldn't think the automobile microphone would pick up these noises. The phone microphone probably would since it would be closer to where the phone is clacking against the interior of the car. Is there a setting that chooses which microphone to use (ie. car vs phone) for BT calls? I asked her if she tried forgetting the phone and then re-pairing it but not sure if she's ried that. Any ideaas appreciated. Thanks.